Die for forming optical fiber coupling connector and forming method

Abstract

The invention discloses a die for forming an optical fiber coupling connector, which comprises a die cavity insert, a male die and a female die, wherein the die cavity insert comprises a tail part and a blind hole forming part; male die is used for accommodating and fixing the tail part of the die cavity insert; and the female die comprises a forming cavity having a lens forming part and a supporting hole which is formed on the side wall of the female die and corresponds to the forming part of the lens, a positioning block is matched in the supporting hole and is used for holding and positioning the blind hole forming part to align the center of the blind hole forming part and the center of the lens forming part. Compared with the prior art, the die adopts the positioning block to hold and position the die cavity insert, so the collimation of the blind hole is greatly increased. The invention also relates to a method for forming the optical fiber coupling connector.

Description

technical field [0001] The invention relates to a mold and a molding method for molding an optical fiber coupling connector. Background technique [0002] Fiber coupling connectors are generally equipped with a blind hole and a lens. The blind hole is used to accommodate the optical fiber. The lens is located at the bottom of the blind hole to optically couple with the fiber. The coupling degree between the blind hole and the lens directly determines the optical fiber. Transmission efficiency of coupled connectors. [0003] At present, injection molding is a commonly used method for making optical fiber coupling connectors, and the molds used for injection molding usually include mold inserts for forming blind holes, and mold inserts that match with the mold inserts and have lens molding parts. cavity, and the mold core fits with the forming cavity to form the optical fiber coupling connector. [0004] However, the central axis of the blind hole of the optical fiber coupli...

AI Technical Summary

Problems solved by technology

[0004] However, the central axis of the blind hole of the optical fiber coupling connector molded by the above mold will deviate to a certain extent relative to the central axis of the lens, which will affect the coupling accuracy between the blind hole and the lens.

There are roughly two reasons for the deflection of the blind hole of the optical fiber coupling connector relative to the lens: on the one hand, during the injection molding process, the temperature difference will cause unfavorable factors such as thermal expansion of the mold, and these unfavorable factors will affect the mold. The matching accuracy, so that the relative displacement of the central axis of the mold core and the central axis of the lens forming part used to form the lens will cause the relative displacement of the blind hole of the optical fiber coupling connector after molding and the central axis of the lens. On the other hand, during the molding process, the fluid material will impact the core of the mold. Under the impact of the material, the core of the mold is likely to be skewed, which will lead to the optical fiber coupling connection after molding. The blind hole of the device is skewed and the deflection angle is generated

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